Silt and muddy waters were the main problem said a scuba diver assigned to grave detail. And the bodies kept wanting to float up so they had to weigh them down. Yeah, there seems like there would be an easier way but you know the US government. If they were in charge of the Sahara desert, they’d run out of sand.
LOL...nice.
I spent some time on Fort Jefferson as a graduate student and wrote a paper on how the surrounding keys have changed shape over time. I did some snorkeling around the island and don’t remember it as being particularly murky.